Fig. 4: Regressions of the Niño3.4 index against the South Atlantic SSTA over the two subperiods in observations.
From: Decline in Atlantic Niño prediction skill in the North American multi-model ensemble
a, b simultaneous regressions of Niño3.4 index against the SSTA and 850hPa wind anomalies. c, d same as (a, b), but with the Niño3.4 index leading by 3 months; e, f same as (a, b), but with the Niño3.4 index leading by 6 months; Only regressions with significance level of p < 0.05 are plotted. Black boxes indicate the northeastern pole and southwestern pole of the South Atlantic Ocean Dipole. Red box indicates the ATL3 region.
